A systematic fan design was adopted to study the performance of sunflower and groundnut at 26 density variables in sole and intercrop systems with two planting patterns at the Andhra Pradesh Agricultural University during summer 1983 and 1984 and kharif 1983. The yield densiry relationships were best fitted to the exponential model Y=abx for either component. The two-row groundnut intercrop planting pattern to share 67% virtlual area in sunflower densities of 35,467 to 162,134 plants/ha enhanced the total oilseed production over sole sunflower in the summer seasons. In kharif intercrop, yield total sxceded the sole crop feld either or sunflower of groundnut. The three row groundnut intercrop planting pattern to share75% virtual area in sunflower densities of 23,616 to 107,959 plants/ha produced more yield than either components in sole crop during the summer seasons as well as kharif. The most productive density of sunflower ranged from about 75,000 to 100,000 plants/ha for intercropping groundnut in a pattern to share 75% virtual area in summer or kharif.